Room Additions in Arleta that keep water out of the new room

Arleta room additions detailed to keep water out: flashed roof tie-ins, sill pans at every window and a yard graded to carry runoff away from new footings.

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Water decides whether an Arleta addition stays sound. Rain that sheets off the old roof onto the new one, a downspout that empties beside a fresh footing, or a window set without a sill pan can all show up later as stains and soft wood. We plan the drainage before the framing: where every gutter goes, how the yard is graded away from the new walls, and how each opening is flashed.

Flashing at the roof tie-in

Where the new roof butts into the old one, water gets its best chance to slip under the covering. We lay self-adhered membrane in every valley, run step flashing up any wall the new roof meets, and build a cricket behind anything that would trap runoff. Gutters on the new section are sized for the added roof area and either join the existing run or feed a new downspout. Rain should leave both roofs at the eaves, and never find its way to the joint between them.

Plans and permits for Arleta

LADBS reviews additions in Arleta, which belongs to the City of Los Angeles. Our plan set covers the site plan with setbacks, the floor plans, framing and foundation details with engineering, and the energy forms. During construction, inspectors check the footing trenches, the framing and roof sheathing, the insulation and the final work. We add grading and drainage notes to the site plan as well, since the inspector will want to see water directed away from the new foundation before signing off.

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